Blithefulness is a state of being carefree and joyous. However, there are several synonyms that can be used to describe this feeling. One synonym is exuberance, which refers to being full of energy and excitement. Another synonym is lightheartedness, which means to be cheerful and without worries. Joviality is also a synonym that connotes being merry and jolly. Another word that can be used to describe blithefulness is high-spiritedness, which signifies being lively and enthusiastic. Similarly, buoyancy is another synonym that denotes being youthful and optimistic. So, whether you're feeling blitheful, exuberant, lighthearted, jovial, high-spirited, or buoyant, it's the essence of joy that you're feeling.